Implement music attenuation for Linux

UnleashedRecomp/CMakeLists.txt

@@ -413,6 +413,11 @@ if (CMAKE_SYSTEM_NAME MATCHES "Linux")
     find_package(X11 REQUIRED)
     target_include_directories(UnleashedRecomp PRIVATE ${X11_INCLUDE_DIR})
     target_link_libraries(UnleashedRecomp PRIVATE ${X11_LIBRARIES})
+
+    set(DBus_DIR "${UNLEASHED_RECOMP_THIRDPARTY_ROOT}/dbus")
+    find_package(DBus REQUIRED)
+    include_directories(UnleashedRecomp PRIVATE ${DBUS_INCLUDE_DIRS})
+    target_link_libraries(${PROJECT_NAME} PRIVATE ${DBUS_LIBRARIES})
 endif()
 
 target_precompile_headers(UnleashedRecomp PUBLIC ${UNLEASHED_RECOMP_PRECOMPILED_HEADERS})

UnleashedRecomp/os/linux/media_linux.cpp

@@ -1,7 +1,206 @@
 #include <os/media.h>
+#include <os/logger.h>
+#include <dbus/dbus.h>
 
-bool os::media::IsExternalMediaPlaying()
+#include "app.h"
+
+#define MEDIA_CHECK_RATE 1
+
+static float g_mediaCheckTimer;
+static bool g_mediaLastResult;
+
+static DBusConnection* CreateDBusConnection()
+{
+    DBusError dbusError;
+    dbus_error_init(&dbusError);
+
+    DBusConnection* result = dbus_bus_get(DBUS_BUS_SESSION, &dbusError);
+    if (dbus_error_is_set(&dbusError))
+    {
+        LOGF_ERROR("Failed to create DBus connection: {0}", dbusError.name);
+        return nullptr;
+    }
+
+    return result;
+}
+
+static void DestroyDBusConnection(DBusConnection* connection)
+{
+    assert(connection != nullptr);
+	dbus_connection_unref(connection);
+}
+
+static std::vector<std::string> GetMediaPlayerBusNames(DBusConnection* connection)
 {
-    // This functionality is not supported in Linux.
-    return false;
+    assert(connection != nullptr);
+
+    auto result = std::vector<std::string>();
+
+    DBusMessageIter rootIterator;
+    DBusMessageIter arrayIterator;
+	DBusPendingCall* pendingReturn;
+
+    DBusMessage *message = dbus_message_new_method_call("org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus", "ListNames");
+    if (!message)
+    {
+        LOG_ERROR("Failed to create D-Bus Message!");
+        return result;
+    }
+
+    dbus_message_iter_init_append(message, &rootIterator);
+    if (!dbus_connection_send_with_reply(connection, message, &pendingReturn, 40))
+    {
+        LOG_ERROR("Failed to create D-Bus Message!");
+        return result;
+    }
+
+    if (!pendingReturn)
+    {
+        LOG_ERROR("D-Bus Pending call is null!");
+        return result;
+    }
+
+    dbus_connection_flush(connection);
+    dbus_message_unref(message);
+    dbus_pending_call_block(pendingReturn);
+    message = dbus_pending_call_steal_reply(pendingReturn);
+    if (!message)
+    {
+        LOG_ERROR("Failed to get D-Bus reply!");
+        return result;
+    }
+
+	dbus_pending_call_unref(pendingReturn);
+
+    if (!dbus_message_iter_init(message, &rootIterator))
+    {
+        LOG_ERROR("D-Bus message has no arguments!");
+        return result;
+    }
+
+    if (dbus_message_iter_get_arg_type(&rootIterator) != DBUS_TYPE_ARRAY)
+    {
+        LOG_ERROR("D-Bus message returned invalid type!");
+        return result;
+    }
+
+    dbus_message_iter_recurse(&rootIterator, &arrayIterator);
+    do
+    {
+        const char *rawName;
+        dbus_message_iter_get_basic(&arrayIterator, &rawName);
+        const std::string name = rawName;
+        if (name.starts_with("org.mpris.MediaPlayer2."))
+            result.emplace_back(name);
+    } while (dbus_message_iter_next(&arrayIterator));
+
+    return result;
 }
+
+static bool IsMediaPlayerPlaying(DBusConnection* connection, const std::string& busName)
+{
+    assert(connection != nullptr);
+
+    DBusMessageIter rootIterator;
+    DBusMessageIter arrayIterator;
+    DBusPendingCall* pendingReturn;
+
+    DBusMessage* message = dbus_message_new_method_call(busName.c_str(), "/org/mpris/MediaPlayer2", "org.freedesktop.DBus.Properties", "Get");
+    if (!message)
+    {
+        LOG_ERROR("Failed to create D-Bus Message!");
+        return false;
+    }
+
+    auto interfaceName = "org.mpris.MediaPlayer2.Player";
+    auto propertyName = "PlaybackStatus";
+
+    dbus_message_iter_init_append(message, &rootIterator);
+    if (!dbus_message_iter_append_basic(&rootIterator, DBUS_TYPE_STRING, &interfaceName))
+    {
+        LOG_ERROR("Failed to append interface name to D-Bus Message!");
+        return false;
+    }
+
+    if (!dbus_message_iter_append_basic(&rootIterator, DBUS_TYPE_STRING, &propertyName))
+    {
+        LOG_ERROR("Failed to append property name to D-Bus Message!");
+        return false;
+    }
+
+    if (!dbus_connection_send_with_reply(connection, message, &pendingReturn, 40))
+    {
+        LOG_ERROR("Failed to create D-Bus Message!");
+        return false;
+    }
+
+    if (!pendingReturn)
+    {
+        LOG_ERROR("D-Bus Pending call is null!");
+        return false;
+    }
+
+    dbus_connection_flush(connection);
+    dbus_message_unref(message);
+    dbus_pending_call_block(pendingReturn);
+    message = dbus_pending_call_steal_reply(pendingReturn);
+    if (!message)
+    {
+        LOG_ERROR("Failed to get D-Bus reply!");
+        return false;
+    }
+
+    dbus_pending_call_unref(pendingReturn);
+
+    if (!dbus_message_iter_init(message, &rootIterator))
+    {
+        LOG_ERROR("D-Bus message has no arguments!");
+        return false;
+    }
+
+    if (dbus_message_iter_get_arg_type(&rootIterator) == DBUS_TYPE_VARIANT)
+        dbus_message_iter_recurse(&rootIterator, &arrayIterator);
+    else
+        arrayIterator = rootIterator;
+
+    if (dbus_message_iter_get_arg_type(&arrayIterator) != DBUS_TYPE_STRING)
+    {
+        LOG_ERROR("D-Bus message returned invalid type!");
+        return false;
+    }
+
+    const char *rawStatus;
+    dbus_message_iter_get_basic(&arrayIterator, &rawStatus);
+    const std::string status = rawStatus;
+    return status == "Playing";
+}
+
+bool os::media::IsExternalMediaPlaying()
+{
+    //Calling D-Bus functions too much seems cause D-Bus to stop working, so perhaps it should be run less often.
+    g_mediaCheckTimer -= App::s_deltaTime;
+    if (g_mediaCheckTimer > 0)
+        return g_mediaLastResult;
+
+    g_mediaCheckTimer = MEDIA_CHECK_RATE;
+
+    const auto dbusConnection = CreateDBusConnection();
+    if (!dbusConnection)
+        return false;
+
+    bool result = false;
+
+    std::vector<std::string> busNames = GetMediaPlayerBusNames(dbusConnection);
+    for (const auto& bus : busNames)
+    {
+        if (IsMediaPlayerPlaying(dbusConnection, bus))
+        {
+            result = true;
+            break;
+        }
+    }
+
+    DestroyDBusConnection(dbusConnection);
+    g_mediaLastResult = result;
+    return result;
+}

UnleashedRecomp/patches/audio_patches.cpp

@@ -20,13 +20,19 @@ static be<float>* GetVolume(bool isMusic = true)
 
 bool AudioPatches::CanAttenuate()
 {
-#if _WIN32
+#if defined(_WIN32) || defined(__linux__)
     if (m_isAttenuationSupported >= 0)
         return m_isAttenuationSupported;
 
     auto version = os::version::GetOSVersion();
 
+#if defined(_WIN32)
     m_isAttenuationSupported = version.Major >= 10 && version.Build >= 17763;
+#endif
+
+#if defined(__linux__)
+    m_isAttenuationSupported = true;
+#endif
 
     return m_isAttenuationSupported;
 #else

thirdparty/dbus/DBusConfig.cmake

@@ -0,0 +1,59 @@
+# - Try to find DBus
+# Once done, this will define
+#
+#  DBUS_FOUND - system has DBus
+#  DBUS_INCLUDE_DIRS - the DBus include directories
+#  DBUS_LIBRARIES - link these to use DBus
+#
+# Copyright (C) 2012 Raphael Kubo da Costa <rakuco@webkit.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1.  Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+# 2.  Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
+# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FIND_PACKAGE(PkgConfig)
+PKG_CHECK_MODULES(PC_DBUS QUIET dbus-1)
+
+FIND_LIBRARY(DBUS_LIBRARIES
+		NAMES dbus-1
+		HINTS ${PC_DBUS_LIBDIR}
+		${PC_DBUS_LIBRARY_DIRS}
+)
+
+FIND_PATH(DBUS_INCLUDE_DIR
+		NAMES dbus/dbus.h
+		HINTS ${PC_DBUS_INCLUDEDIR}
+		${PC_DBUS_INCLUDE_DIRS}
+)
+
+GET_FILENAME_COMPONENT(_DBUS_LIBRARY_DIR ${DBUS_LIBRARIES} PATH)
+FIND_PATH(DBUS_ARCH_INCLUDE_DIR
+		NAMES dbus/dbus-arch-deps.h
+		HINTS ${PC_DBUS_INCLUDEDIR}
+		${PC_DBUS_INCLUDE_DIRS}
+		${_DBUS_LIBRARY_DIR}
+		${DBUS_INCLUDE_DIR}
+		PATH_SUFFIXES include
+)
+
+SET(DBUS_INCLUDE_DIRS ${DBUS_INCLUDE_DIR} ${DBUS_ARCH_INCLUDE_DIR})
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(DBUS REQUIRED_VARS DBUS_INCLUDE_DIRS DBUS_LIBRARIES)